Rule 34 Dev - anthro anus ass backsack balls elderly foreskin fur genitals grey_body grey_fur haxsmack looking_back male male_only mammal master_splinter mature_male murid murine old old_man penis presenting presenting_anus rat rise_of_the_teenage_mutant_ninja_turtles rodent solo teenage_mutant_ninja_turtles topknot|11809975984